The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة xi
... Rodent Pests 138 Mice 139 Rats 139 Difficulties of Pest Control 140 Effects of Bird Destruction 140 Unsatisfactory Remedies 141 Rabbits 142 Cats 143 Disease 143 Needless Slaughter 144 Bird Protection 144 Man versus Insects 145 Insect ...
... Rodent Pests 138 Mice 139 Rats 139 Difficulties of Pest Control 140 Effects of Bird Destruction 140 Unsatisfactory Remedies 141 Rabbits 142 Cats 143 Disease 143 Needless Slaughter 144 Bird Protection 144 Man versus Insects 145 Insect ...
الصفحة 58
... rodents falls to about 40 ° sometimes nearly 35 ° . A little oxygen reaches them but they require so little that immersion for an hour in carbon dioxide will not kill them . They must be fat when they begin the long sleep and must waken ...
... rodents falls to about 40 ° sometimes nearly 35 ° . A little oxygen reaches them but they require so little that immersion for an hour in carbon dioxide will not kill them . They must be fat when they begin the long sleep and must waken ...
الصفحة 124
... ful sorts like the sparrow hawk which lives largely on rodents . The damage they do is really in the destruction of bird friends of man . It is no longer the fashion to call the red 124 THE PHYSICAL BASIS OF SOCIETY Protecting Poultry.
... ful sorts like the sparrow hawk which lives largely on rodents . The damage they do is really in the destruction of bird friends of man . It is no longer the fashion to call the red 124 THE PHYSICAL BASIS OF SOCIETY Protecting Poultry.
الصفحة 125
... rodents ; two or three are devoured at a meal . Quite different are these records from that of the sharp - shinned hawk , which lives on a diet 98 per cent bird . The Department of Agriculture has examined some 50,000 stomachs of hawks ...
... rodents ; two or three are devoured at a meal . Quite different are these records from that of the sharp - shinned hawk , which lives on a diet 98 per cent bird . The Department of Agriculture has examined some 50,000 stomachs of hawks ...
الصفحة 126
... rodents are far from negligible . Weeds are but plants which man does not use or are useful plants growing in fields reserved for other crops . In the South , Johnson grass is a very valuable fodder but if it starts in a field of cotton ...
... rodents are far from negligible . Weeds are but plants which man does not use or are useful plants growing in fields reserved for other crops . In the South , Johnson grass is a very valuable fodder but if it starts in a field of cotton ...
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